Root knot

Species of the nematode Meloidogyne cause root knot.The nematode becomes inactive after prolonged flooding.

Symptoms

• The disease symptoms include enlargement of the roots and the formation of galls or knots. 
• The swollen female nematode can be found in the center of this tissue.
•  Plants are dwarfed, yellow, and lack vigor

Control measures

Deep ploughing and application of organic matter help reduce the disease condition.